Reports until 09:37, Wednesday 19 February 2020
H1 CDS
david.barker@LIGO.ORG - posted 09:37, Wednesday 19 February 2020 (55178)
CDS Maintenance Summary: Tuesday 18th February 2020

WP8536 Reduce Guardian logs lookback

Jamie, TJ

The Guardian log lookbacks were reduced to 2 months. TJ verified that this improved log retrieval times.

h1iscex IO Chassis new DC power supply

Richard, Keita, Fil, Dave:

The h1iscex front end and IO Chassis were powered down and the IO Chassis was powered from a different +24V power source. Later in the day it was noted that the 21st channel of the second ADC (adc0-ch20) was misreading. Instead of reading -500 counts it was reading +2000. When the cable connecting the ADC to the AA chassis was disconnected, all channels in this ADC went to zero except for chan20 which increased to 10,000. Fil boosted the power and after a second IO Chassis cycle the problem was resolved.

EX Beckhoff hardware restored

Richard, Fil, Dave:

After a week with some photodiodes disconnected from the EX Beckhoff slow controls system, these were restored. The Beckhoff status on the CDS overview went GREEN, I added EX back into the full system summary.